Pulp-roll skinner



1?. A.. NORTH PULPR'OLL SKINNER Filed Nov. 16. 1 22 4 Sheets-Sheet 1 I INVENTOR.

K4) :4. ,er/l

I ATTORNEYS.

Au 18, 1925. I

R. A.. NORTH PULP ROLL-SKINNER Filed. Nov. 1-6. 1922 4'Sheecs-Sheet 2'- R. A. NORTH PULP ROLL SKINNER 'Filed Nov. l6, i922 4 Sheets-Sheet 5 INVENTOR. 54/ 6? Ab ATTORNEYS.

Aug. 18, 1925.

R. A. NORTH PULP ROLL SKINNER Filed Nov. 16. 1.922 4 Sheets=$iieet ENVENTOR.

A TRNEYS.

Patented Aug. 18, 1925.

PATENT came.

RAY A. noirrn, or GREEN BAY, WISCONSIN.

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Application filed November 16, 1922'. Serial no. 601,290.

To all whom-chomp concern:

Be it known that I, RAY A. Non'rn, a citizen ot the United States, residing at Green Bay, in the county of Brown and State of lVisconsin, have invented certain new and useful Improvements in Pulp-Roll Skinners, of which the following is a specification.

The invention relates to a pulp skinning machine, and more particularly to the class of maehin'es for cutting and skinning pulp from the collecting rolls of a paper making machine.

The primary object of the invention is the provision of a machine of this character, wherein the construction thereof is novel in form, so that the pulp can be automatically cut or ripped from the roll of a wet machine employed in the making of paper, thereby eliminating the manual operation by a skinnet, as is usual.

Another object of the invention is the provision of a machine of this character, wherein the thielniess oi the pulp upon the pulp roll of a wet machine will control the operation oi the skinning machine, which in its construction is simple, thoroughly reliable and -eiticient in operation, and inexpensive to manufacture and install.

lVith these and other objects view the invention consists in the features of construction, combination and arrangement of parts as will be hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereunto appended.

ltn the accompanying drawings:

Figure 1, is a fragmentary diagrammatic side elevation of a conventional Wet machine for paper making, showing in similar elevation the skinning machine constructedin accordance with the invention,

Figure 2, is a top plan view of the skinning machine.

Figure 3, is a view looking toward the rear of the machine.

Figure 4, is aview similar to Figure 1, looking toward the other side of the Ill-itchines.

Figure 5, is a vertical sectional elevation through the skinning machine, taken approximately on the line 55 of Figure 3.

Figure '6, is an enlarged sectional view through the controlling clutch showing details thereof.

Similar reference characters indicate corresponding parts throughout the several views in the drawings.

teierring to the drawings in detail, A, designates a portion of the frame of a wet machine or pulp press of any standard style or make, having the usual superposed rolls B, and C, respectively, between which passes pulp or straw board fibre from a vat, the pulp or fibre being conveyed from the latter through the medium of a felt belt (not shown) lori ning a part of the said machine.

The pulp or fibre when passing between the rolls B, and C, is in a thin film and a considerable amount of water is squeezed therefrom by said rolls, while the pulp or fibre is taken up or adheres to the roll C, and upon a certain number of revolutions the desired thickness of pulp or fibre is accumulated on said roll of the" wet machine.

It is then desired in the case of the pulp to cut the same so that the said pulp will leave the roll C, in sheet term. In case of wood fibre or pulp it is not necessary that the sheet be cut straight, ;as is required in other cases, because each sheet is folded and the number of sheets are bundled together to make a bale for shipment. In case oi" other board fibres, however, it is necessary that the out be square, so as to produce accurate rectangular sheets 0t fibre board. Heretotore, the cutting operation of the pulp or fibre from the roll G, has been effected by hand or manually, as a man would be requ'ired to stand at the machine with a stick about the size of an ordinary broom 113.111 dlewith a rather dull point on the end and when the desired thickness of pulp had accumulated on roll C, he would insert the pointed end of the stick under" the thickness of pulp at one end otthe roll and by pushing the stick across the latter the sheet of pulp would be ripped so that the sheet of pulp will leave the roll, and this operation is known as roll skinning.

It is the aim and purpose of the present invention to effect the skinning of the roll C, automatically through the operation of the attachment hereinaiter fully described.

The attachment or machine comprises stand -10, including spaced vertical side frames v11, connected throngh the medium of upper and lower cross braces 12, and 13, respectively, to give the required rigidity to the stand. At the uppermost portions of the side frames 11, are bearings i i, which is journaled a driving shaft 1 5;, having splined or keyed thereto at one end portion of the same outside of the stand 10, a collar 16, provided in one point thereof with a transversely slidable clutch pin 17, adaptable for locking engagement in a socketed clutch disk 18, fixed to a sprocket pinion 19, loosely journaled upon the shaft 15, adjacent to the collar 16, so that at determined intervals the latter and pinion 19, will be clutched together in a manner and for a purpose presently described.

Supported on and secured to the side frame 11, next to the end of the shaft 15, carrying the collar 16, is a hanger 20, for a tripping dog or pawl 21, pivoted thereto, which dog or pawl is designed to normally engage in an annular groove 22, formed in the collar 16, anda notch 23, in the clutch pin 17, to hold the latter out of engagement with the clutch disk 18, and thereby free the pinion from the collar. The pin 17, is ten sioned for locking engagement in the disk 18, through the medium of a coiled spring 24, concealed within the collar in any desirable manner.

Above the dog or pawl 21, is a spring trigger 25, which engages with the outer latch end 26, of the dog or pawl 21, the said trigger being carried by an arm 27, fixed to a rocker shaft 28, suitably journaled forwardly of the driven shaft 15, and also fixed to this rocker shaft 28, is a lifter lever 29, having at its free end an adjustable rest screw 30.

The rest screw 30, is designed to contact with the extension 31, of a yoke member 32, adapted to straddle the journal 33, of the roll C, which cooperates with the roll B, and it will be apparent that when the pulp or fibre accumulates between the said rolls B, and C, the latter roll will become elevated accordingly, whereupon the yoke member 32, will be lifted by the said roll C, so that the extension 31, will act upon the lift lever 29, which in turn will operate the arm 27, to actuate the trigger 25, for freeing the pawl or dog 21, whereby it will become disengaged from the groove 22, to release the clutch pin 17 for the automatic engagement thereof with the clutch disk 18, on the pinion 19, and thus lock the collar 16 and the latter together, for imparting rotation to the shaft 15, the pinion being driven through the medium of a sprocket chain 34, trained thereover and also trained over a sprocket wheel fixed to the journal 36, of the roll B, as will be obvious.

On the other end of the shaft 15, is a crank disk 36, to which through the medium of a wrist pin 37, is connected a rack arm 38, the toothed portion 39, thereof being in mesh with a rack pinion 40, formed on the hub 41, of a reversely rotatable pulley 42, stub journaled at 43, to the side frame 10, next to said pulley.

The side frames 10, of the stand are provided with horns 44, having secured therein a horizontal guide rod 45, on which are slidably mounted skinning members 46, and 47, respectively, which at their outer free ends have adjustably mounted thereon adjustable ripping implements 48, the same being disposed in outwardly convergent relation to each other, and on the approach of the members 46, and 47, in close relation to each other, the implements 48, will partially overlap one another at the center of the roll C, to assure the positive stripping of the sheet film of pulp or fibre upon the roll C, crosswise of the latter, to cut the same therefrom during the operation of the pulp press.

J ournaled upon the horn 44, next to the pulley 42, in any suitable manner is a pair of spaced pulleys 49, having trained thereover the respective stretches D and E, of an endless wire cable or rope 50, the latter being coiled once about the pulley 42, and also guided over a single pulley 51, suitably journaled on the other horn 44, at the other end of the stand, and this cable or rope functions in a manner and for a purpose presently described.

The skinning members 46 and 47, are provided with tail pieces 52, which are slidably fitted between the double rails of an adjustable guide 53, supported in the stand in any desirable manner. On one of the tail pieces 52, is a clamp 54 for securing the stretch D, of the cable or rope thereto, while on the skinning member 47, of the other tail piece is a clamp 55, for securing the stretch E, of the cable or rope thereto. It will be seen that when the pulley 42 is reversely rotated the cable will be likewise reversely moved, thereby shifting the stretches of the same in oppositely directed paths, so that the skinning members 46 and 47, will be caused to approach and recede toward and from each other for the proper operation of the ripping implements to cut the film of pulp from the roll C, and have said pulp leave the same in sheet form.

Supported in the stand is a chute or con veyor 57, for receiving the pulp sheets cut from the roll C, and discharging the same at the required point therefrom.

It is of course understood that the guide 53, hereinbefore mentioned may be of sub stantially V-shape so that the ripping of the sheet from the roll C, will follow this form, accordingly to the character of pulp or fibre worked upon in the wet machine or pulp press.

Again referring to the clutch mechanism hereinbefore described, it will be pointed out that the pawl or dog 21, is normally engaged in the groove 22, in the collar 16, so as to hold the clutch pin 17, out of engagement with the clutch disk 18, thereby -freeing the collar 16, from the pinion 19, which collar is splined or keyed to the shaft 15, so that the said pinion will rotate upon the latter without motion being imparted to the shaft.

Now, when a determined thickness of pulp has accumulated between the rolls B, and C, the latter will be elevated raising with it the yoke member 32, which becomes active upon the litter lever 29, for the operation of the arm 27, and in turn the trigger 25, to release the pawl or dog 21, for its disengagement from the groove 22, in the collar 16, whereupon the clutch pin 17, under the action of its spring will engage in the clutch disk 18, thereby locking the collar 16, and pinion 19, together, so that motion will be imparted to the shaft 15, which will transmit motion to the cable or rope 50, to actuate the skinning members 46 and 47, and their ripping implements @8, carried thereby "for the cuttlng of the pulp or fibre adhering to the roll C, therefrom in sheet form.

' On the collar 16, is a cam 58, which at a determined interval is designed to engage with the inner end 01' the trigger plunger 59, so as to permit the dog or pawl 21, to enter the groove 22, in the collar 16, after the sheet of pulp left the roll C, subsequently to the ripping operation of the skinning attachment, whereby the latter will be in condition for the next operation.

What is claimed is:

1. A machine 01" the character described, comprising a stand, a horizontal rod supported therein at one, side of the same, a pair of skinning members slidably engaged upon the rod hinged and adjustable to move in a straight line, ripping implements carried by the members, mechanism for reversely moving said members in unison toward and away from each other to make a straight out across a roll, means for guiding the members, and driving mechanism for controlling the first named mechanism.

2. A machine of the character described, comprising a stand, reversely movable hinged skinning members supported in the stand and adapted to move toward and away from each other, cable means for actuating the members, ripping implements adjustably carried on the members and cutting straight across a roll, mechanism for imparting reverse movement to the cable means, and clutch mechanism for. controlling the last named mechanism.

A machine of the character described, comprising a stand, reversely movable hinged skinning members supported in the stand and adapted toapproach and recede to and from each other in a straight line, an endless cable having its stretches connected to the members, ripping implements adjustably connected to the members adjustably supported pulleys guiding said cable, mechanism for imparting reverse movements to the stretches of the cable, means for driving said mechanism, clutch means be tween the driving means and said mechanism, and mechanism for controlling the clutch.

4. A machine of the character described, comprising a stand, reversely movable hinged skinning members supported in the staiid and having adjustable ripping implements carried thereby, a cable having its stretches connected to the respective members, means for reversely moving the cable, adjustable means for guiding the members in their movements, adjustable means for guiding the stretches of the cable, mechanism for imparting motion to the cable moving means, a driving element for said mechanism, a clutch between the latter and said mechanism, and means active upon the accumulation of pulp on a pulp roll to regulate the clutch.

In testimony whereof I afiix my signature.

' RAY A. NORTH. 

